[BREAKING CHANGE] Element: Drop support for $, deprecated since 2015
[BREAKING CHANGE] Element: Drop support for $, deprecated since 2015

Seems unused: https://codesearch.wmflabs.org/deployed/?q=%5C.%5C%24%5C.&i=nope&files=.*%5C.js&repos=

Change-Id: I971b9eb14564c819ba3cfd8e38eea0524e69d5ee

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui